13.BMT对SrTiO3基高压陶瓷电容器储能的影响

陈方元^1,2，王华博^1,2，，陶静^1,2，汪小红^1,2*，吕文中^1,2

（1华中科技大学光学与电子信息学院，2电子信息功能材料教育部重点实验室，湖北武汉430074）

关键词：介电常数；耐压强度；储能密度

中图分类号：TP212   文献标识码：A

摘要：采用固相反应法制备出了(1-x)(Sr_0.84Pb_0.16)O₃-xBi(Mg_1/2Ti_1/2)O₃陶瓷（(1-x)SPT-xBMT，x=0-0.08）。研究了Bi(Mg_1/2Ti_1/2)O₃对SPT陶瓷结构、介电性能及储能特性的影响。结果表明BMT与SPT可形成固溶体，BMT的引入能增强材料的弛豫特性。当添加Bi(Mg_1/2Ti_1/2)O₃的摩尔分数6%时，在1270°C的温度下烧结获得了具有优异的性能：er=1980，tand=0.00325，Eb=16kV/mm，储能密度J=0.544J/cm³（E=11kV/mm时）的高压陶瓷电容器储能材料。

Influenceof BMT on the energy storage of SrTiO₃-Based high voltage ceramiccapacitors

Chen fangyuan^1,2,Wanghuabo^1,2,Tao jing^1,2,Wang xiaohong^1,2,Luwenzhong^1,2

(1 Schoolof Optical and Electronic Information, Huazhong University of ScienceandTechnology,2 Key Lab of Functional Materialsfor Electronic Information(B), MOE, Wuhan 430074)

Keywords: dielectric constant; breakdown strength; energy storage density

Abstract: (1-x)(Sr_0.84Pb_0.16)O₃-xBi(Mg_1/2Ti_1/2)O₃((1-x)SPT-xBMT,x=0-0.08) ceramics were prepared by the conventional mixed oxide method. Theeffects of Bi(Mg_1/2Ti_1/2)O₃(BMT) on the structure,dielectric properties and energy storage characteristic of (Sr,Pb)TiO₃ ceramicswere studied. The results indicated that BMT and SPT formed a solid solutionwith perovskite structure. With the addition of BMT, a change from a normalferroelectric behavior to a relaxor-like behavior was observed. The 0.94(Sr_0.84Pb_0.16)O₃-0.06Bi(Mg_1/2Ti_1/2)O₃ceramics sintered at 1270°C exhibitedattractive properties of er=1980，tand=0.00325，Eb=16kV/mm，J=0.544J/cm³ (at E=11 kV/mm), which is suitable for the applicationof high voltage capacitors.